81 x 9 = 801. What must you do to make the this equation true?

There are forty elephants and they have forty-fore heads. How can this be possible?

One day, I thought of ways that can be used for creating a palindrome. So I decided that I will turn into a larger number by adding the reversed digits to the original number and keep doing it till I finally obtained a palindrome.

I am not sure if this process will always result in a palindrome eventually but I was able to produce a four-digit palindrome. Can you guess my starting number?

Prove that twice of ten is the same as twice of eleven.

Which Number is the odd one out?

A) 7145
B) 2716
C) 5321
D) 4135

What building has the most stories?

In one of the popular batman series movie "Batman Forever", there was a riddle that goes like "Tear me off and then scratch my head and I was red then and now I am back. Who am I?

What four weights can be used to balance from 1 to 30 pounds?

Take number 1000 and then add 20 to it.
Now add 1000 one more time.
Now add 30.
Now add 1000 one more time.
Now add 40.
Now add 1000 one more time.
Now add 10.

What is the total?

A seven-year-old kid challenged his classmates that he can make the number one disappear by adding something to it.

How can he do that?